HRMECS - High-Resolution Medium-Energy Chopper Spectrometer
Instrument Scientist
- Alexander Kolesnikov
Scientific Assistant - Lynette Jirik
| Beam line |
H3 |
| Moderator |
30 K solid methane |
| Incident energy E0: |
3-1000 meV |
| Resolution: |
DE/E0(FWHM)
= 2-4% for 0 < E < 800meV,
DQ/Q0
= 1% for 0.2 < Q < 30Å-1 |
| Beam size: |
7.5 cm wide, 10 cm high |
| Chopper rotation frequency: |
E0
30-270 Hz; t0 30-150 Hz |
| Detector angles: |
-20°
< f < 140° |
| Detector configuration: |
304 vertical 3He single-end detectors (Ø
2.5 cm ´ 45 cm) covering
28°-62°
and 102°-133°
angle area.
94 vertical linear position-sensitive 3He
detectors (LPSD, Ø 2.5
cm ´ 80 cm) and
16 horizontal LPSDs (Ø
2.5 cm ´ 40 cm) covering a
"small" angle area –20°
to 20°. |
| Moderator-to-sample distance: |
l1 +
l2 = 13.8 m |
| Sample to detector distance: |
l3 = 4 m |
| Sample environment: |
Displex 8-300 K, ILL Orange
cryostat 1.5-300K,
furnaces 300-1200 K, large volume (7 cm3) Aluminum-alloy high-pressure cell, P=max 4.5 kbar |
References:
1. C.-K. Loong et al.,
Nucl. Instr. Methods, A260 (1987) 381-402.
2.
C.-K. Loong et al., ICANS-XII, RAL Report 94-025 (1994)
320-327; ibid, 36-43.
3.
A. I. Kolesnikov, J. M. Zanotti, C.-K. Loong, Neutron News, 15, (2004) 19-22.
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